And Ive’s diamond ring is as unique as you’d expect it to be. That’s because the only material in the ring is diamond–no metals at all, even for the band. He made the jewelry with longtime collaborator Marc Newson exclusively for the (RED) Auction, which raises funds to help eliminate HIV/AIDS in Africa. As Sotheby’s explains:

Ive & Newson’s design is singular, clear and un-compromised by the traditional metal settings and bands that have previously been required to create ‘diamond rings’. Theirs will be created by removing material rather than adding–an ambition made possible by the extraordinary scale of the stone which will enable the ring to be completely made of this material.

Creating a ring-shaped diamond is no small feat; the diamond block will be faceted with several thousand facets, some of which are as small as several hundred micrometers. The interior ring will be cylindrically cut out for the desired smoothness using a micrometer thick water jet inside which a laser beam is cast. The finished ring will have between 2000-3000 facets which has never been seen before on a single piece.

If you’re interested in Ive’s diamond ring–good news: Anyone can bid on it when it goes up for auction in Miami on December 5. It’s expected to raise between $150,000-$250,000.